Improvement in hub-boring machines



DQ'B. WRIGHT.

Hub-Boring Nlachines.

Patented Dec. 2, 873.

lnvemur. Q Per Attorneys.

ML PHUTfl-UT/IDGRAPIl/C 00. M X IOSBDRNES P110055) UNITED STATES PATENTQFFIGE.

DAVID B. WRIGHT, or SOUTH AMESBURY, MASSACHUSETTS, ASSIGNOR T0 CYNTHIAA. WRIGHT, or SAME PLACE.

IMPROVEMENT IN HUB-BORING MACHINES.

Specification forming part of Letters Patent No. 145,142, dated December2, 1873; application filed October 11, 1873.

To all whom it may concern:

Be it known that I, DAVID B. WRIGHT, of South Amesbury, in the county ofEssex and State of Massachusetts, have in ented a new and ImprovedHub-Boring Machine, of which the following is a specification:

In the accompanying drawing, Figure 1 represents a front elevation of myimproved hubboring machine; Fig. 2, a sectional side elevation; and Fig.3 a horizontal section of the same on the line 0 0, Fig. 2.

Similar letters of reference indicate corresponding parts.

The object of my invention is to furnish a hub-boring machine for handor other power, whichis simple in construction, and effective inoperation, supporting and centering accurately the hubs of the wheelstobe bored.

The invention will first be fully described and then pointed out in theclaim.

In the drawing, A represents the frame of the hub-boring machine, whichconsists of a larger base part, B, and the vertical standard B supportedthereon. The base part B is laterally connected by pieces a, whichsupport the wheel to be bored in horizontal position, forming a platformfor the same, to which it may be rigidly fastened, if desired, byapplying strong clamps to the outer rim of the same. A lower lateralpiece, 11, carries centrally a vertical plate, d, to which are pivotedthe toggle-levers e. Levers e have jaws f at their upper ends, whichtake hold of the hub at diametrically-opposite sides, and center itaccurately below the boring-mandrel b. Jaws fare adjusted to the hub bylink g, connecting the toggle-levers and screw h, which is placedvertically below the axis of the mandrel O, securing thereby the exactcentral position and bore of the hub. Screw h turns in a lug, h, ofplate 01, and carries link 9 and jaw f onto or off the hub, asnecessary.

The mandrel O is set, in the usual manner, in vertical position onstandard B, and driven by hand or other power, applied to driving-shaft2', by the intermeshing conical wheels 1. The cutters m are keyed atopposite sides, one slightly below the other, into the tapering end ofmandrel C, so as to cut evenly and steadily into the hub. The degree ofdepth of the entering cutters is regulated by means of a hand-wheel andscrew, n, applied on the top of mandrelO, by which the cutters can befed as required for the different sizes of hubs and box recesses.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1 The toggle-levers e havingjaws f, the socketthreadedlink 9 and the screw h, combined with a plate, d, having lug h, andattached to platform, B a b, as and for the purpose described.

DAVID B. YVRIGHT.

\Vitnesses JOSEPH K. J ENNESS, Enwn. F. ADAMS.

